"The Grizzlies' already undermanned frontcourt now must endure an unexpected and potentially devastating loss.

Forward Darrell Arthur left practice Sunday morning with what was believed to be a torn right Achilles and the fear is that he might be lost for the entire 2011-12 season, according to sources with knowledge of situation.

Team officials are waiting for further test results, but a preliminary evaluation indicated that Arthur's condition is serious, according to the sources. The Grizzlies are expected to announce the extent of Arthur's injury and a final prognosis today. "